/* $OpenBSD: x509_sxnet.c,v 1.1 2020/06/04 15:19:32 jsing Exp $ */

/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL

 * project 1999.

 */

/* ====================================================================

 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * 3. All advertising materials mentioning features or use of this

 *    software must display the following acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    licensing@OpenSSL.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 * ====================================================================

 *

 * This product includes cryptographic software written by Eric Young

 * (eay@cryptsoft.com).  This product includes software written by Tim

 * Hudson (tjh@cryptsoft.com).

 *

 */

#include <stdio.h>

#include <string.h>

#include <openssl/asn1.h>

#include <openssl/asn1t.h>

#include <openssl/conf.h>

#include <openssl/err.h>

#include <openssl/x509v3.h>

/* Support for Thawte strong extranet extension */

#define SXNET_TEST

static int sxnet_i2r(X509V3_EXT_METHOD *method, SXNET *sx, BIO *out,

    int indent);

#ifdef SXNET_TEST

static SXNET * sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,

    STACK_OF(CONF_VALUE) *nval);

#endif

const X509V3_EXT_METHOD v3_sxnet = {

  .ext_nid = NID_sxnet,

  .ext_flags = X509V3_EXT_MULTILINE,

  .it = &SXNET_it,

  .ext_new = NULL,

  .ext_free = NULL,

  .d2i = NULL,

  .i2d = NULL,

  .i2s = NULL,

  .s2i = NULL,

  .i2v = NULL,

#ifdef SXNET_TEST

  .v2i = (X509V3_EXT_V2I)sxnet_v2i,

#else

  .v2i = NULL,

#endif

  .i2r = (X509V3_EXT_I2R)sxnet_i2r,

  .r2i = NULL,

  .usr_data = NULL,

};

static const ASN1_TEMPLATE SXNETID_seq_tt[] = {

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(SXNETID, zone),

    .field_name = "zone",

    .item = &ASN1_INTEGER_it,

  },

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(SXNETID, user),

    .field_name = "user",

    .item = &ASN1_OCTET_STRING_it,

  },

};

const ASN1_ITEM SXNETID_it = {

  .itype = ASN1_ITYPE_SEQUENCE,

  .utype = V_ASN1_SEQUENCE,

  .templates = SXNETID_seq_tt,

  .tcount = sizeof(SXNETID_seq_tt) / sizeof(ASN1_TEMPLATE),

  .funcs = NULL,

  .size = sizeof(SXNETID),

  .sname = "SXNETID",

};

SXNETID *

d2i_SXNETID(SXNETID **a, const unsigned char **in, long len)

{

  return (SXNETID *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,

      &SXNETID_it);

}

int

i2d_SXNETID(SXNETID *a, unsigned char **out)

{

  return ASN1_item_i2d((ASN1_VALUE *)a, out, &SXNETID_it);

}

SXNETID *

SXNETID_new(void)

{

  return (SXNETID *)ASN1_item_new(&SXNETID_it);

}

void

SXNETID_free(SXNETID *a)

{

  ASN1_item_free((ASN1_VALUE *)a, &SXNETID_it);

}

static const ASN1_TEMPLATE SXNET_seq_tt[] = {

  {

    .flags = 0,

    .tag = 0,

    .offset = offsetof(SXNET, version),

    .field_name = "version",

    .item = &ASN1_INTEGER_it,

  },

  {

    .flags = ASN1_TFLG_SEQUENCE_OF,

    .tag = 0,

    .offset = offsetof(SXNET, ids),

    .field_name = "ids",

    .item = &SXNETID_it,

  },

};

const ASN1_ITEM SXNET_it = {

  .itype = ASN1_ITYPE_SEQUENCE,

  .utype = V_ASN1_SEQUENCE,

  .templates = SXNET_seq_tt,

  .tcount = sizeof(SXNET_seq_tt) / sizeof(ASN1_TEMPLATE),

  .funcs = NULL,

  .size = sizeof(SXNET),

  .sname = "SXNET",

};

SXNET *

d2i_SXNET(SXNET **a, const unsigned char **in, long len)

{

  return (SXNET *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,

      &SXNET_it);

}

int

i2d_SXNET(SXNET *a, unsigned char **out)

{

  return ASN1_item_i2d((ASN1_VALUE *)a, out, &SXNET_it);

}

SXNET *

SXNET_new(void)

{

  return (SXNET *)ASN1_item_new(&SXNET_it);

}

void

SXNET_free(SXNET *a)

{

  ASN1_item_free((ASN1_VALUE *)a, &SXNET_it);

}

static int

sxnet_i2r(X509V3_EXT_METHOD *method, SXNET *sx, BIO *out, int indent)

{

  long v;

  char *tmp;

  SXNETID *id;

  int i;

  v = ASN1_INTEGER_get(sx->version);

  BIO_printf(out, "%*sVersion: %ld (0x%lX)", indent, "", v + 1, v);

  for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {

    id = sk_SXNETID_value(sx->ids, i);

    tmp = i2s_ASN1_INTEGER(NULL, id->zone);

    BIO_printf(out, "\n%*sZone: %s, User: ", indent, "", tmp);

    free(tmp);

    ASN1_STRING_print(out, id->user);

  }

  return 1;

}

#ifdef SXNET_TEST

/* NBB: this is used for testing only. It should *not* be used for anything

 * else because it will just take static IDs from the configuration file and

 * they should really be separate values for each user.

 */

static SXNET *

sxnet_v2i(X509V3_EXT_METHOD *method, X509V3_CTX *ctx,

    STACK_OF(CONF_VALUE) *nval)

{

  CONF_VALUE *cnf;

  SXNET *sx = NULL;

  int i;

  for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {

    cnf = sk_CONF_VALUE_value(nval, i);

    if (!SXNET_add_id_asc(&sx, cnf->name, cnf->value, -1))

      return NULL;

  }

  return sx;

}

#endif

/* Strong Extranet utility functions */

/* Add an id given the zone as an ASCII number */

int

SXNET_add_id_asc(SXNET **psx, const char *zone, const char *user, int userlen)

{

  ASN1_INTEGER *izone = NULL;

  if (!(izone = s2i_ASN1_INTEGER(NULL, zone))) {

    X509V3error(X509V3_R_ERROR_CONVERTING_ZONE);

    return 0;

  }

  return SXNET_add_id_INTEGER(psx, izone, user, userlen);

}

/* Add an id given the zone as an unsigned long */

int

SXNET_add_id_ulong(SXNET **psx, unsigned long lzone, const char *user,

    int userlen)

{

  ASN1_INTEGER *izone = NULL;

  if (!(izone = ASN1_INTEGER_new()) ||

      !ASN1_INTEGER_set(izone, lzone)) {

    X509V3error(ERR_R_MALLOC_FAILURE);

    ASN1_INTEGER_free(izone);

    return 0;

  }

  return SXNET_add_id_INTEGER(psx, izone, user, userlen);

}

/* Add an id given the zone as an ASN1_INTEGER.

 * Note this version uses the passed integer and doesn't make a copy so don't

 * free it up afterwards.

 */

int

SXNET_add_id_INTEGER(SXNET **psx, ASN1_INTEGER *zone, const char *user,

    int userlen)

{

  SXNET *sx = NULL;

  SXNETID *id = NULL;

  if (!psx || !zone || !user) {

    X509V3error(X509V3_R_INVALID_NULL_ARGUMENT);

    return 0;

  }

  if (userlen == -1)

    userlen = strlen(user);

  if (userlen > 64) {

    X509V3error(X509V3_R_USER_TOO_LONG);

    return 0;

  }

  if (!*psx) {

    if (!(sx = SXNET_new()))

      goto err;

    if (!ASN1_INTEGER_set(sx->version, 0))

      goto err;

    *psx = sx;

  } else

    sx = *psx;

  if (SXNET_get_id_INTEGER(sx, zone)) {

    X509V3error(X509V3_R_DUPLICATE_ZONE_ID);

    return 0;

  }

  if (!(id = SXNETID_new()))

    goto err;

  if (userlen == -1)

    userlen = strlen(user);

  if (!ASN1_STRING_set(id->user, user, userlen))

    goto err;

  if (!sk_SXNETID_push(sx->ids, id))

    goto err;

  id->zone = zone;

  return 1;

err:

  X509V3error(ERR_R_MALLOC_FAILURE);

  SXNETID_free(id);

  SXNET_free(sx);

  *psx = NULL;

  return 0;

}

ASN1_OCTET_STRING *

SXNET_get_id_asc(SXNET *sx, const char *zone)

{

  ASN1_INTEGER *izone = NULL;

  ASN1_OCTET_STRING *oct;

  if (!(izone = s2i_ASN1_INTEGER(NULL, zone))) {

    X509V3error(X509V3_R_ERROR_CONVERTING_ZONE);

    return NULL;

  }

  oct = SXNET_get_id_INTEGER(sx, izone);

  ASN1_INTEGER_free(izone);

  return oct;

}

ASN1_OCTET_STRING *

SXNET_get_id_ulong(SXNET *sx, unsigned long lzone)

{

  ASN1_INTEGER *izone = NULL;

  ASN1_OCTET_STRING *oct;

  if (!(izone = ASN1_INTEGER_new()) ||

      !ASN1_INTEGER_set(izone, lzone)) {

    X509V3error(ERR_R_MALLOC_FAILURE);

    ASN1_INTEGER_free(izone);

    return NULL;

  }

  oct = SXNET_get_id_INTEGER(sx, izone);

  ASN1_INTEGER_free(izone);

  return oct;

}

ASN1_OCTET_STRING *

SXNET_get_id_INTEGER(SXNET *sx, ASN1_INTEGER *zone)

{

  SXNETID *id;

  int i;

  for (i = 0; i < sk_SXNETID_num(sx->ids); i++) {

    id = sk_SXNETID_value(sx->ids, i);

    if (!ASN1_INTEGER_cmp(id->zone, zone))

      return id->user;

  }

  return NULL;

}